Knock on driver side help

I Have a 406 1997 and it has developed a knock on the drivers side at the
front, it sounds like a tin of beans under the seat rolling and hitting the
framework of the seat, but I have had a look, no tins.
It happens at iregular times, perhaps on acceleration but not always if you
turn sharply it may do it, sometimes it just may do it when changing
direction.
It only does one knock at a time so it should rule out the drive coupling,
if anyone has had the same problem or you need any more info just
ask....kind regards Mick.

 

Sounds like suspension to me mate, could be a drop link or a bush gone, I'd
get to a garage and have it checked.

 

It could be the driver side (right hand drive) top engine mount getting
loose. The way to check is:
Use a jack & a piece of wood to support the engine.
Remove the screws holding the bracket between the engine and the mount body.
After you remove the top bracket of the mount, whether the mount is loose is
clear.
Put Loctite on the thread of the mount before you tighten it.
Hope this info helps.
Tim